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Abstract

In this paper, the performance of an on-chip hollow-core-waveguide (HW)
using high-contrast gratings (HCG) for analog signal transmission is analyzed
numerically. Simulation results indicate that after propagating 100 m in a
HCG-HW with optimally designed parameters, there is very little degradation
of either third-order intermodulation distortion spur-free dynamic range (IM3
SFDR) or third-order harmonic distortion (THD) SFDR. Due to the chromatic
dispersion of the HCG-HW, the highest second-order harmonic distortion (SHD)
SFDR is limited to 107.3 dB ·Hz1/2. In addition, >
100 dB ·Hz 2/3 IM3 SFDR can be achieved over a radio frequency (RF) range of 80
GHz and an optical wavelength bandwidth of 50 nm after propagation 100 m through
a HCG-HW. The parameter dependence of the waveguide performance is also investigated.
With a ±20 nm variation on all parameters, the propagation length in an HCG-HW
is limited to ~6 m in order to maintain an IM3 SFDR of >100 dB ·Hz2/3.

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